42212447 has 4 divisors (see below), whose sum is σ = 42251160. Its totient is φ = 42173736.

The previous prime is 42212441. The next prime is 42212459. The reversal of 42212447 is 74421224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42212447 - 2⁴ = 42212431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42212441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17672 + ... + 19917.

It is an arithmetic number, because the mean of its divisors is an integer number (10562790).

Almost surely, 2^42212447 is an apocalyptic number.

42212447 is a deficient number, since it is larger than the sum of its proper divisors (38713).

42212447 is a wasteful number, since it uses less digits than its factorization.

42212447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38712.

The product of its digits is 3584, while the sum is 26.

The square root of 42212447 is about 6497.1106655189. The cubic root of 42212447 is about 348.1877674986.

The spelling of 42212447 in words is "forty-two million, two hundred twelve thousand, four hundred forty-seven".